The order and sequence can be important if operations are being performed
on the data and they are relied on later in the stage. For example, if
data is being filtered by a value that exists in a
SET column within the source data,
the settostring filter must be
defined before the data is filtered, otherwise the actual string value
will not be identified.

Warning

In some cases, the filter order and sequence can also introduce errors.
For example, when using the pkey
filter and the optimizeupdates
filters together, pkey may remove
KEY information from the THL before
optimizeupdates attempts to
optimize the ROW event, causing the filter to raise a failure condition.